2. 职称英语
  3. After a store had sold k television sets for p dollars each, it reduced the pric

After a store had sold k television sets for p dollars each, it reduced the pric

游客2025-02-24  52
问题 After a store had sold k television sets for p dollars each, it reduced the price p of each set by 5 percent and then sold twice as many sets at this reduced price.

Column A                                       Column B
The total revenue from the sale of
all of these television sets                    2.95pk
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案 B
解析 一家商店以每台p美元售出k台电视后，把每台电视机的价格(p美元)降低了5％，然后以降低后价格卖出了2倍量的电视机。
解：本题的正确答案为(B)。比较的左项为卖出这些台电视机的总销售额：pk+2pk(1-5％)=2.9pk
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